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0. WETTBRHAN.

OSGILLATING CHAIR.

No. 308,022 Patented Nov. 11, 1884.

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CHARLES VVETTERHAN, OF FOND DU LAO, WISCONSIN, ASSIGNOR OF ONE- HALF TO CHARLES A. SHULTZ, OF SAME PLACE.

OSCILLATING CHAIR.

SPECIFICATION forming part of Letters Patent No. 308,022, dated November 11, 1884.

Application filed November 19, 1883.

T on whom it may concern.-

Be it known that I, CHARLES VVETTERHAN, a citizen of the United States, residing at Fond du Lac, in the county of Fond du Lac and State of "Wisconsin, have invented a new and useful Oscillating Chair, of which the fol lowing is a specification.

My invention relates to improvements in rocking and revolving easy-chairs; and the novelty consists in the construction. arrangement, and adaptation of parts, as will be more fully hereinafter set forth, 'and specifically pointed out in the claims.

The invention is illustrated in the accompanying drawings, which form a part of this specification, and in which Figure 1 is a side elevation of the chair. Fig. 2 is a plan of the base, rail, frame, and adjuncts thereof. Fig. 3 is a vertical crosssection of the device supporting the chairseat. Fig. 4 is a side elevation showing the rocker-section. Fig.oshowsthespiralsprings and equivalent coil-spring with their respective adjustments to bearings. Fig. 6 is a detached View of the rocker piece or shaft with the strap orlooped spring-head through which passes the core-rod of the spiral spring, as shown.

Similar letters refer to similar parts throughout the several views.

A designates a chair-body of any suitable construction and material, supported upon a frame, E, the two standards, E, of which extend downward, and are pivoted upon a pin, e, in the side cases, F. These cases F are rigid with a spider, B, the transverse arms of which are divided into four branches, B, and each branch formed into a pin, the three pins 0 0 and 6 being on the same horizontal plane as the spider B, and the central branch of the pin cl extending upward and through the case, its extremity acting loosely in a slot, y, to limit the oscillations of the chair body. These branches, formed into pins 0 0, c, and d, are secured in any proper manner to the cases F, and serve to hold them rigid with the spider B. The arms of the spider B are provided with casters h, which traverse a track orway, G, having ears 9, by which it is secured to a base, 0, which rests upon the floor.

(No model.)

The spider B turns loosely on a central threaded axis, 1), and is held to such axis by a cap-nut, N. WVhen it is desired to use the device as a revolving chair, the nut is adjusted to allow the spider B to turn freely on its axis; but by screwing down the nut properly the friction may be increased sufficiently to hold the parts firmly together.

at designates a rod secured to plates f in each of the cases F, and it is curved in the arc of a circle having the pin 6 for a center, and is located within the cases.

Between a strap, :0, secured to the frame E and the plate f upon either side, and hung upon the rod (1, is a spiral spring, D, the constant force of which spring is exerted to hold the chair in a position of rest, with the standards E vertical, as seen in Fig. 4, and When the chair is rocked backward or forward to serve to restore it to such position. In Fig. 5 a spring, D, is shown, which may be used instead of or in connection with the springs D.

I attach importance to the construction of the spider B in its relation to the cases, the base, and the standards, and to the construction by which the rocking-chair may be revolved. As shown, the way G of the base has a circular groove, in which operate globerollers, which also operate in recesses in the arms of the spider; but this construction may be varied at will-as, for instance, the casters may be secured to the arms of the spider.

The description of parts and application thereof relate, of course, to either sides or sections of the chair. The material of construction may be metal or wood, according to the adaptationof either to the work or parts.

Having shown the construction and working of my device, I claim as my invention- 1. In combination with the seat, the frame B, a stationary base, 0, and casters b, saidframe having a series of arms terminating in pins, cases F, and standards E, as shown and described.

2. The spider-frame B, having arms B, terminating in pins, as shown, combined with the cases F, springs D, and chair-standards E, as set forth.

3. In a chair, substantially as described,the combination, with the standards E E, having slots 3 and strap 00, the pins 0 0, e, and d, the springs D, chair-frame A, and base B, as set :0 forth.

CHARLES \VETTERHAN.

Witnesses:

GEO. L. ARNOLD, J. E. PERRY. 

